
Part 1: What is MP4 Video ?
MP4 is the official multimedia container for MPEG-4 video and audio. Although such video can be stored in a number of modern containers, including MPEG-2 PS/TS and Matroska, the development of MP4 is important because it gives hobbyists a replacement for the outdated AVI container which became the standard for MPEG-4 ASP (DivX, XviD, 3IVX, etc,...) video.
While MP4 works fine as a container format, it does have some issues that need to be resolved if its to become any kind of standard for hobbyists. Its primary problem is in audio support. Like the MPEG-2 container formats (Program Stream and Transport Stream) MP4 allows both native audio streams (encoded to a standard defined as part of MPEG-4) and private streams (those not part of the MPEG-4 specs). Unlike those formats, however, there's very little support among software and hardware vendors reading private streams. As a result, if your MP4 file contains audio in a format other than AAC there's a good chance your player won't be able to read it.
Part 2: How to convert TS video ?
Step 0: Download and install 4Videosoft TS to MP4 Converter

Step 1: Click button to load your TS videos.
Step 2: Click the "Profile" button to select an output format.
Step 3: Click button to choose your output destination file.
Step 4: Click the “Start” to start the conversion.
Note:
1: How to join the videos
If you would like to put several files into one output file, please tick the check box of the
2: How to save your favorite picture
If you like the current image when preview video, you can use the "Snapshot" option. Just click the , the image will be saved and you can click the "Open" button next to "Snapshot" button to open your picture.
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